SPECTRE FFT 2048 POINTS & OSCILLOSCOPE
专业声音与音响诊断测试 - Display Test Online
Visualisez la répartition des fréquences en temps réel, les formes d'onde d'oscilloscope et les cascades spectrogrammes avec l'API Web Audio.
20Hz 至 20,000Hz 完整音频频段实时柱状图可视化。
20 Hz100 Hz500 Hz1 kHz5 kHz10 kHz20 kHz
峰值共振频率
0 Hz
音高 : --
最大声压振幅
-96.0 dBFS
动态范围 (DR)
频谱重心
0 Hz
音色频段平衡
FFT 采样精度
2048 Pts
48kHz / 1024 频点通道
诊断协议与流程
如何进行屏幕测试 (01, 02, 03)
01
准备工作
清洁显示器表面灰尘，关闭环境光自动感应，并将屏幕设置为原生分辨率与最高刷新率。
02
开始执行
进入全屏模式 (F11)，利用诊断控制栏依次切换并观察各种专业测试图案。
03
结果评估
在暗室环境下从不同视角细致观察屏幕均匀度、坏点与拖影，参考工程指南判断面板品质。
硬件架构解析
面板显示技术深度解析
专业级 IPS 面板 (In-Plane Switching)
极致色彩精准度与广视角，广泛用于专业调色显示器。暗室环境下存在轻微 IPS Glow 漏光现象。
消费/电竞 IPS (Fast IPS / Nano IPS)
专为电竞优化的超高刷新率与极速灰阶响应，但静态对比度较 VA 面板略低。
VA 面板 (Vertical Alignment)
原生 3000:1+ 超高静态对比度与纯正暗部表现，常用于曲面屏，高速运动下偶有暗部拖影。
OLED (有机发光二极管) 与 QD-OLED
像素级独立自发光，实现真正的纯黑、零拖影近乎即时响应及无穷大对比度，受自动亮度限制 (ABL) 调控。
Technical FAQs & Helpful Content
FAQ Analyseur de Spectre & FFT
关于此项诊断工具、校准步骤及显示器技术标准所需了解的一切。
01.What is an FFT audio spectrum analyzer?
An FFT (Fast Fourier Transform) audio spectrum analyzer converts time-domain audio signals into their constituent frequency components, displaying volume intensity across the 20Hz to 20kHz audible spectrum.
02.How do I switch between bar spectrum, oscilloscope, and spectrogram waterfall modes?
Use the mode toggle buttons in the top control bar to switch between 128-band bar spectrum, high-speed oscilloscope waveform, and rolling spectrogram waterfall displays.
03.Can I analyze my live microphone or external audio input?
Yes. Selecting the 'Microphone' source mode requests browser permission to analyze your live microphone, ambient room noise, or line-in audio interface.
04.What is spectral centroid in audio engineering?
Spectral centroid indicates the center of mass of an audio spectrum. A higher centroid (e.g. >3000Hz) corresponds to a brighter, sharper sound, while a lower centroid indicates a warmer, bass-heavy timbre.
05.What frequency range does this spectrum analyzer cover?
Our Web Audio FFT engine analyzes frequencies from 20Hz (deep sub-bass) up to 20,000Hz (20kHz high treble) at standard 48kHz sampling rates.
06.How does the pitch note indicator work?
The pitch note calculator identifies the fundamental musical frequency (e.g., A4 = 440Hz, C4 = 261.6Hz) based on standard 12-tone equal temperament Tuning.
07.Why is an uncompressed Web Audio spectrum analyzer superior to software downloads?
Web Audio runs direct 64-bit floating-point mathematical calculations in browser RAM with zero installation overhead and zero lossy compression artifacts.
08.Can I test speaker crossover points using the built-in generator?
Yes. Selecting the 'Generator' source mode sweeps from 20Hz to 20kHz, allowing you to observe where subwoofers transition into desktop monitors.
09.What is peak amplitude dBFS?
dBFS (Decibels relative to Full Scale) measures digital audio signal amplitude where 0 dBFS represents maximum clipping threshold and -96 dBFS represents silence.
10.Does sample rate affect FFT frequency resolution?
Yes. A 2048-point FFT at 48kHz sample rate yields a resolution bin width of approximately 23.4Hz per frequency bin across 1024 distinct bands.
不确定接下来该运行哪项测试？需要故障排除建议？
阅读完整诊断指南 →PASS
MOTEUR FFT PRÊT
AnalyserNode Web Audio
2048/FFT
Largeur de Bande23.4 Hz
Fréquence de Rafraîchissement60 fps
Télémétrie Spectrale
Données Temps Réel AES17
Fréquence de Crête
1000Hz
Amplitude de Crête
-6.0dBFS
Centroïde Spectral
1420Hz
Contrôles de l'Analyseur
Options d'Affichage & Source
Shortcuts
Keyboard Navigation
Space
Démarrer / ArrêterM
Changer de Mode d'AffichageTV users can navigate with D-Pad & Remote arrow keys